CN107442264B - The wet split recovery process of valuable component in a kind of waste printed circuit board - Google Patents
The wet split recovery process of valuable component in a kind of waste printed circuit board Download PDFInfo
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- CN107442264B CN107442264B CN201710486372.3A CN201710486372A CN107442264B CN 107442264 B CN107442264 B CN 107442264B CN 201710486372 A CN201710486372 A CN 201710486372A CN 107442264 B CN107442264 B CN 107442264B
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- printed circuit
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/82—Recycling of waste of electrical or electronic equipment [WEEE]
Abstract
The invention discloses a kind of wet split recovery process of valuable component in waste printed circuit board, comprising: step 1 disassembles waste printed circuit board to obtain waste printed circuit board bare board；Step 2 removes solder to waste printed circuit board bare board；Step 3 will remove the successively wet process coarse crushing and wet process is fine crushing obtains waste printed circuit board particle of the waste printed circuit board bare board after solder；Waste printed circuit board particle screening is classified by step 4, obtains the material that particle size fraction is -1+0.5mm, -0.5+0.25mm, -0.25+0.074mm and -0.074mm；The material that particle size fraction is -1+0.5mm, -0.5+0.25mm, -0.25+0.074mm and -0.074mm is fed distinct device sorting by step 5 respectively, respectively obtains metal concentrate and nonmetallic enrichment body；Metal concentrate and nonmetallic enrichment body are separately recovered step 6.Have the beneficial effect that using the metal component and nonmetallic ingredient in a variety of physical separation technologies separation different grain size grade material, obtained metal concentrate and nonmetallic enrichment body product quality preferably, the rate of recovery it is higher, environmental pollution is small.
Description
Technical field
The present invention relates to valuable group in Disposal of Electronic Wastes recycling field more particularly to a kind of waste printed circuit board
The wet split recovery process divided.
Background technique
In recent years, Electronic products manufacturing industry is being developed with stable speed always, with the continuous progress of science and technology and people
Continuous improvement of the class to electronic product functional requirement, the life cycle shortened of electronic product, resulting electronic waste
Object is more and more.It is counted according to European Union's related data, electron wastes growth rate during 2008 to 2014 is always maintained at
It is 4 times of common rubbish 11% or so.It is pointed out in " the global electronic garbage monitoring in 2014 " of United Nations University's publication,
The global raw 41,800,000 tons of electronic wastes of common property in 2014, however only 16% electronic waste is recycled or is reused.
Contain the electronic component that can largely continue to use, the metals such as the higher copper of grade, aluminium, iron, gold, silver in discarded printed circuit boards
With precious metal material and the nonmetallic materials such as glass and plastics, there is significant resourceization regeneration value.For example, 1 ton of print
The gold contained in printed circuit board is up to more than 80 grams.Important component of the printed circuit board as electronic product, due to its material
Material composition and combination are extremely complex, and liberation degree of minerals is small, and metal component and nonmetallic ingredient are not easy to realize separation, synthesis
Recovery processing is always a considerably complicated problem.
The technology of recycling waste printed circuit board is broadly divided into physiochemical mutagens technology, pyrometallurgy and hydrometallurgical etc. three at present
Kind technology.Pyrometallurgy recycles that waste printed circuit board is high-efficient, simple process, but the environmental pollution generated is larger.Hydrometallurgy energy
Consume that small, synthetical recovery is high-efficient, but process flow is generally more complex, the more difficult recovery processing of the acid waste liquid of generation.Physiochemical mutagens
Technology is environmentally protective, recovery efficiency is high, simple process, but due to mostly using the discarded electricity of single one physical sorting technology recycling greatly at present
Road plate, sharpness of separation is lower, so that the resultant metal grade after sorting is difficult to reach the demand of relevant industries, while causing many
In nonmetallic enrichment body, eventually leading to valuable component in waste printed circuit board cannot effectively be recycled for metal component mispairing.
Summary of the invention
In view of above-mentioned analysis, the present invention is intended to provide the wet split of valuable component recycles work in a kind of waste printed circuit board
Skill, to solve the problems, such as that applicable material size narrow range, recovery efficiency caused by existing single one physical recovery technology are lower.
The purpose of the present invention is mainly achieved through the following technical solutions:
The wet split recovery process of valuable component, mainly comprises the steps that in a kind of waste printed circuit board
Step 1 disassembles waste printed circuit board, the waste printed circuit board bare board after being disassembled；
Step 2 carries out removing solder to waste printed circuit board bare board；
Step 3 will remove the waste printed circuit board bare board after solder and successively carry out wet process coarse crushing and wet process is fine crushing, be discarded
Circuit board particle；
Waste printed circuit board particle is fed Wet multi-stage vibrating screen progress sieve classification by step 4, and obtaining particle size fraction is -1+
The material of 0.5mm, -0.5+0.25mm, -0.25+0.074mm and -0.074mm；
Particle size fraction is fed variable diameter water Jie for the material of -1+0.5mm, -0.5+0.25mm and -0.074mm by step 5 respectively
Matter sorting bed, waterpower shaking table and Falcon centrifugal classifier are sorted；The material that particle size fraction is -0.25+0.074mm is fed
Flotation device is sorted；It is sorted, respectively obtain metal concentrate and nonmetallic enrichment body；
Step 6 recycles metal concentrate that each equipment sorts and nonmetallic enrichment body respectively.
Present invention process individually sorts after waste printed circuit board particle is carried out multilayer sieve classification, compared with prior art,
The advantages of present invention is using individually sorting: first, adaptable screening installation can be selected for a relatively narrow particle size fraction material,
Influence of the material size to sharpness of separation is reduced, to strengthen material in screening installation by density separation；Second, it selects and adapts to
The relatively narrow particle size fraction material of screening installation, can play the advantage of each screening installation to large extent, various kinds of equipment have one compared with
Ideal material size range, when pan feeding is within this particle size range, separating effect is preferable.
Further, the component disassembled waste printed circuit board in the step 1 passes sequentially through component point
Class, component performance detection carry out classification processing.
The component that dismantling waste printed circuit board obtains includes resistance, capacitor, inductance, diode, transistor, relay, collection
It is whether intact by using the function of multimeter detection these components at circuit etc., the intact component of function is classified as
Recycling component；By function damage and component containing harmful substances such as polybrominated biphenyls, polychlorinated biphenyls be classified as it is toxic
Harmful component；Some functions are damaged but the higher component of tenor is classified as the high component of tenor, are such as inserted
The content of aluminium and copper is higher in slot；Disassemble obtained component be divided into the high component of recycling component, tenor and
Poisonous and harmful component, wherein recycling component can be used in the maintenance of used equipment and the production of new component；To metal
The high component of content carries out smelting processing, to recycle valuable metal therein；And poisonous and harmful component is then useless according to solid
Object pollutes the processing of the relevant laws and regulations such as environment anti-therapy.
Further, in the step 2, the scruff obtained to removing solder is successively slightly refined and is refined, and is met
The solder of national standard.
Further, in the step 3, using wet type bi-fluted roller type crusher and wet type impact-hammer type disintegrator to removing
Waste printed circuit board bare board after solder successively carries out wet process coarse crushing and wet process is fine crushing.
The present invention carries out wet process coarse crushing and wet process is fine crushing can effectively reduce dust and toxic and harmful gas in shattering process
Generation.
Further, the crushing circuit of the wet process coarse crushing and wet process composition fine crushing is two-stage wet method crushing circuit.
In shattering process, the every reduction of the granularity of material is once a reduction stage, and the form of the composition of reduction stage has: 1) single
One crushing operation；2) pre-screening-crushing operation；3) it is crushed-check screening operation；4) pre-screening-is crushed-check screening work
Industry；The present invention is fine crushing using wet process coarse crushing and wet process, because referred to herein as two-stage wet method is broken；Two-stage wet method of the present invention is broken
It is broken relative to single hop wet crushing process, two-stage wet method is broken to have that crushing efficiency is high, good (product granularity is more equal for product characteristic
It is even, cross degree of grinding it is smaller), low energy consumption and the higher advantage of sorting index.
Further, the waste printed circuit board grain diameter obtained after the wet process coarse crushing is less than 20mm, and the wet process is fine crushing
The waste printed circuit board grain diameter obtained afterwards is less than 1mm.
Step 3 of the present invention finally obtains waste printed circuit board grain diameter less than 1mm after wet process is fine crushing, is to make it
In metal component dissociated as far as possible with nonmetallic ingredient, to improve the sorting index of crushed product, be subsequent further sorting
It creates favorable conditions.
Further, in the step 3, the volume for the water being added during wet process coarse crushing accounts for wet type bi-fluted roller type crusher
The volume of the 10%~20% of crusher chamber volume, the water being added during wet process is fine crushing accounts for wet type beater type crushing chamber of crusher
The 20%~30% of volume.
The present invention carries out that broken crushing effect is good using wet process, effectively reduces the generation of dust and pernicious gas.
Further, in the step 4, the screen size of the Wet multi-stage vibrating screen be successively from top to bottom 1mm,
0.5mm, 0.25mm and 0.074mm；In the Wet multi-stage vibrating screen vibrating motor shake frequency be suitable for adjustable range be 900~
1500 times/min, amplitude is suitable for that adjustable range is 4~8mm, and vibrating direction angle is suitable for that adjustable range is 40 °~60 °.
Wet multi-stage vibrating screen can improve screening efficiency, and screen size is depending on the material size grade of equipment sorting
's；Wet process Multilayer vibrating screen mainly plays screening and dehydration.
Further, in the step 5, -1+0.5mm particle size fraction the material feeds the sorting of diameter-verifying water medium sorting bed,
The material size range of the diameter-verifying water medium sorting bed is 0.25~1mm, and processing capacity is 6~21kg/h；Water velocity is suitable
Suitable adjustable range is 5.5~7.5m3/ h, bed body inclination angle are suitable for that adjustable range is 25 °~40 °, and delivery rate is suitable for adjustable range
For 100~350g/min.
Present invention selection above parameter range, available preferable separating effect, the metal concentrate sorted
Metal content is higher than 90%, and metal recovery rate is higher than 90%.
Further, in the step 5, -0.5+0.25mm particle size fraction the material feeds waterpower separation by shaking table, the water
The material size range of power shaking table is 0~0.5mm, and processing capacity is 50~100kg/h；Stroke be suitable for adjustable range be 8~
30mm, jig frequency are suitable for that adjustable range is 240~380 times/min, and cross fall is suitable for that adjustable range is 2.5 °~4.5 °, dense to mine
Spending suitable adjustable range is 10%~30%.
Present invention selection above parameter range, available preferable separating effect, the metal concentrate sorted
Metal content is higher than 85%, and metal recovery rate is higher than 90%.
Further, in the step 5, -0.074mm particle size fraction the material feeds Falcon centrifugal classifier, described
The material size range of Falcon centrifugal classifier is 0~0.5mm, and processing capacity is 6~18kg/h；The water pressure that enters to recoil is suitable
Adjustable range is 0.01~0.04MPa, and roller speed is suitable for that adjustable range is 30~50Hz, and feed thickness is suitable for adjusting model
It encloses for 20~40g/L.
Present invention selection above parameter range, available preferable separating effect, the metal concentrate sorted
Metal content is higher than 85%, and metal recovery rate is higher than 75%.
Further, in the step 5, -0.25+0.074mm particle size fraction the material feeds flotation device and is sorted, first
It first carries out a reverse flotation and obtains nonmetallic enrichment body, secondary direct flotation then is carried out to the metal concentrate that sorting obtains, is obtained
To copper concentrate and flotation tailing.
The present invention passes through a reverse flotation, available nonmetallic enrichment body；Secondary direct flotation is carried out to metal concentrate,
Available copper concentrate；By the available three kinds of products of flotation twice in succession, i.e., nonmetallic enrichment body, copper concentrate and containing gold,
Metals and its compound such as silver and zinc, improve product quality, obtain a greater variety of valuable components.
Further, the material size range of the flotation device is 0~0.25mm, and flotation cell volume is 1.5L, handles energy
Power is 6~12kg/h；Wheel speed be suitable for adjustable range be 0~2600r/min, scraper plate revolving speed be suitable for adjustable range be 5~
30r/min；Aeration quantity is suitable for that adjustable range is 100~600mL/ (m2Min), it is 20~30 that slurry temperature, which is suitable for adjustable range,
DEG C, ore pulp mass concentration is suitable for that adjustable range is 100~200g/L.
The present invention selects above parameter range, available preferable separating effect, the metal richness that a reverse flotation obtains
The metal content of collective is higher than 85%, and metal recovery rate is higher than 85%；The grade for the Copper in Concentrate that secondary flotation obtains is higher than
85%, the rate of recovery of copper is higher than 80%.
Further, the flotation tailing after secondary direct flotation is filtered, the flotation is then recycled using wet magnetic separation
Magnetisable material in tailing, the magnetisable material mainly include iron, nickel；Using in acid leaching process and electrolysis method recycling magnetic tailing
Silver；Using gold, platinum and the palladium in aqua regia dissolution's method and extraction recycling magnetic tailing；
Further, the metal concentrate sorted in step 6 is filtered, is then recycled using wet magnetic separator
Magnetisable material therein, the magnetisable material mainly include iron, nickel；Using in acid leaching process and electrolysis method recycling metal concentrate
Copper and silver；Using gold, platinum and the palladium in aqua regia dissolution's method and extraction recycling metal concentrate.
Further, the nonmetallic enrichment body sorted in the step 6 can be used for preparing modified pitch, as compound
The packing material of material and heat treatment prepare active carbon and porous silicate.
The present invention has the beneficial effect that:
(1) present invention process is according to the chemical composition of waste printed circuit board, physical characteristic and metal enrichment situation, using more
Metal component and nonmetallic ingredient in kind of physical separation technology separation different grain size grade material, obtained metal concentrate and non-
The quality of metal concentrate product is higher, and the rate of recovery is higher, and assorting room is economic and environment-friendly；
(2) present invention uses wet split recovery process, effectively reduces the dirt of dust and toxic and harmful gas to environment
Dye.
Other features and advantages of the present invention will illustrate in the following description, also, partial feature and advantage from
It is become apparent in specification, or understand through the implementation of the invention.The objectives and other advantages of the invention can by
Specifically noted structure is achieved and obtained in written specification, claims and attached drawing.
Detailed description of the invention
Attached drawing is only used for showing the purpose of specific embodiment, and is not to be construed as limiting the invention, in entire attached drawing
In, identical reference symbol indicates identical component.
Fig. 1 is the flow chart of the wet split recovery process of valuable component in waste printed circuit board of the present invention.
Specific embodiment
Specifically describing the preferred embodiment of the present invention with reference to the accompanying drawing, wherein attached drawing constitutes the application a part, and
Together with embodiments of the present invention for illustrating the principle of the present invention.
Embodiment 1
The wet split recovery process of valuable component in a kind of waste printed circuit board of the present invention, detailed process is as shown in Figure 1, originally
Embodiment is as follows to the wet split recovery process of valuable component in discarded computer main board:
Step 1 disassembles discarded computer main board, the discarded computer main board bare board after being disassembled, the member under disassembling
Device is classified by component and performance test process, respectively obtains recycling component, the high component of tenor
And toxic, harmful component three classes；Recycling component is for the maintenance of used equipment and the production of new component；Metal is contained
It measures high component and carries out smelting processing, recycle valuable metal therein；To toxic, harmful component according to solid waste dirt
Contaminate the processing of the relevant laws and regulations such as environment anti-therapy；It is resistance, capacitor, electricity that the present embodiment, which discards the component that computer main board is disassembled,
Sense, diode, transistor, relay, integrated circuit etc., it is whether intact by the function of multimeter detection these components, it will
The intact component of function is classified as recycling component；Function is damaged and containing nocuousness such as polybrominated biphenyls, polychlorinated biphenyls
The component of substance is classified as poisonous and harmful component；Some functions are damaged but higher component (such as slot of tenor
The content of middle aluminium and copper is higher) it is classified as the high component of tenor；
Step 2 carries out removing solder processing to discarded computer main board bare board；Then successively to the obtained scruff of removing solder
It is slightly refined and refining obtains solder that meet national standards；The present embodiment removes solder using heating quicksand method；
Step 3, using wet type bi-fluted roller type crusher and wet type impact-hammer type disintegrator to the discarded electricity after removing solder
Brain mainboard bare board carries out wet process coarse crushing respectively and wet process is fine crushing, obtains discarded computer main board particle；Fragment after wet process coarse crushing
Material granularity is less than 20mm, and broken material granularity after wet process is fine crushing is less than 1mm, eventually passes through two sections and broken obtain granularity and be less than
The waste printed circuit board particle of 1mm；
Discarded computer main board particle after wet process is fine crushing is fed Wet multi-stage vibrating screen and sieve and divided by step 4
Grade obtains the material that particle size fraction is -1+0.5mm, -0.5+0.25mm, -0.25+0.074mm and -0.074mm, each particle size fraction object
The mass percent of material is respectively 35%, 15%, 27% and 23%；
The step 5, -1+0.5mm by after classification, -0.5+0.25mm and -0.074mm particle size fraction material successively feed variable diameter
Aqueous medium sorting bed, waterpower shaking table and Falcon centrifugal classifier are sorted, and metal concentrate and nonmetallic richness are respectively obtained
Collective；- 0.25+0.074mm particle size fraction material after classification is fed into flotation device, a reverse flotation is carried out, obtains nonmetallic gold
Belong to enrichment body and metal concentrate；The metal concentrate that reverse flotation of -0.25+0.074mm particle size fraction material is obtained carries out
Secondary direct flotation, obtains copper concentrate, and the flotation tailing after secondary direct flotation is filtered.
Step 6, the gold for sorting the circuit board materials of -1+0.5mm, -0.5+0.25mm and -0.074mm particle size fraction
Belong to enrichment body to be recycled, by the circuit board of -1+0.5mm, -0.5+0.25mm, -0.25+0.074mm and -0.074mm particle size fraction
Obtained nonmetallic enrichment body is sorted to be recycled.
It is noted that the feed size range of the wet type bi-fluted roller type crusher used is 80~200mm, discharging-material size
Range is 15~50mm, and discharging-material size range is adjusted by double teeth roller spacing, and material water ratio is allowed to be lower than 20%.The present embodiment
Wet type bi-fluted roller type crusher is mainly made of the part such as motor, deceleration system, bearing, feeding inlet, discaling roll and rack, is worked
When, rack-mounted motor and deceleration system are rotated by bearing drive drive roll, and drive roll passes through gear drive quilt
Dynamic roller.Drive roll is identical with passive roll structure, and surface is distributed by straight tooth-shaped at groove profile.The straight-tooth of drive roll and passive guide roller is stung mutually
Cooperation moves toward one another, when material is entered between two rollers by feeding inlet, under roller normal pressure, frictional force effect, by two
The breaker roll moved toward one another is involved in crusher chamber, and material is cut into the fillet with straight-tooth similar width.Wet type bi-fluted roller type crusher
The advantages of: the spacing of two tooth rods can be adjusted according to material thickness, hardness and treating capacity.Crusher during the present embodiment coarse crushing
The volume of the water of middle addition accounts for the 20% of broken cavity volume.
It is noted that the fine crushing device used is wet type impact-hammer type disintegrator, feed size range is 10~40mm,
Discharging-material size range is 0~3mm, and material water ratio is allowed to be lower than 25%.Wet type impact-hammer type disintegrator mainly by body, turn
The part such as son, castor body and transmission device forms.When work, material equably feeds crusher chamber by loading hopper, and water flow passes through
Filler pipe enters crusher chamber, and material is broken under the tup impact, shearing splitting effect of revolution at a high speed, meanwhile, material itself
Gravity so that material is rushed at frame body Internal baffle, grating from high-speed rotating tup, be greater than screen size (1mm) material quilt
Detention continues the strike and grinding by tup on sieve plate, and just passing through sieve plate until being crushed to required discharging-material size is discharged machine
Outside.The volume for the water being added in crusher during the present embodiment is fine crushing accounts for the 30% of broken cavity volume.
It is noted that wet process vibration multi-layer grading sieve sieve screen size be successively from top to bottom 1mm, 0.5mm,
0.25mm and 0.074mm；The shake frequency of vibrating motor is suitable for that adjustable range is 900~1500 times/min, and amplitude is suitable for adjustable range
For 4~8mm, vibrating direction angle is suitable for that adjustable range is 40 °~60 °；Screen material is woven wire cloth.
It is noted that diameter-verifying water medium sorting bed sorting -1+0.5mm particle size fraction material, diameter-verifying water medium sorting bed master
It to be made of components such as batch meter, bed body, fluid distributor, filter bag, cyclic water tank and water pumps；It, will circulation with pump when work
Water in water tank is injected within sorting bed body by bed body underflow opening, and recirculated water overflows and flow back into recirculated water by overflow pipe after bed body
Case just forms the power water circulation system of a closure in this way；Then material feeds bed body by batch meter, using rotor stream
Meter controls delivery rate, light-heavy material due to suffered in an aqueous medium gravity and buoyancy difference and transported along different tracks
Dynamic, light material is moved along the motion profile of overflow water as light product, and heavy material along the direction of recirculation water along bed body
Inner wall is slipped to bed body bottom as heavy product, to realize the separation of light-heavy material；Equipment design parameter is as follows, material size
Range is 0.25~1mm, and processing capacity is 6~21kg/h；Diameter-verifying water medium sorting bed bed body base diameter is 200mm, bed body
Base diameter is 120mm, bed height 800mm；Water velocity is suitable for that adjustable range is 5.5~7.5m3/ h, bed body inclination angle are suitable
Suitable adjustable range is 25 °~40 °, and delivery rate is suitable for that adjustable range is 200~450g/min；The present embodiment pan feeding tenor
It is 56.24%；When sorting, water velocity 6.3m3/ h, bed body inclination angle are 34 °, delivery rate 150g/min；Sorting obtains
Metal concentrate metal content be 93%, metal recovery rate 94%.
It is noted that waterpower separation by shaking table -0.5+0.25mm particle size fraction material；Waterpower shaking table mainly by the head of a bed, motor,
The components such as slope adjusting device, bed surface, feed launder, feed trough and riffling composition；When work, flushing water is fed by feed trough and is paved in cross
To on inclined bed surface, uniform inclined-plane sheet flow is formed；When pulp density be 10%~30% material by feed launder from
It flows on bed surface, ore particle loose, layering by the effect that water flow is rinsed and bed surface vibrates in riffling groove；Upper layer low-density mine
Grain is located at the high density ore particle of bed bottom due to being moved downward by the biggish flushing ability of water flow along bed surface lateral inclination
By bed surface differential motion and along bed surface longitudinal movement, be discharged by driving end opposite；Different densities and the ore particle of granularity are in bed surface
On the horizontal and vertical effect that is subject to be different, thus their motion profile is also different, causes it fan-shaped on bed surface
Distribution, the final separation for realizing high/low density material.Equipment design parameter is as follows, and material size range is 0~0.5mm, processing
Ability is 50~100kg/h；Stroke is suitable for that adjustable range is 8~30mm, and jig frequency is suitable for that adjustable range is 240~380 times/min,
Cross fall is suitable for that adjustable range is 2.5 °~4.5 °, and feed ore concentration is suitable for that adjustable range is 10%~30%；In the present embodiment
Pan feeding tenor be 32.52%；When sorting, stroke 18mm, jig frequency is 300 times/min, and cross fall is 3.2 °, gives mine
Concentration is 25%；The metal content for sorting obtained metal concentrate is 88%, metal recovery rate 92%.
It is noted that when using inflating mechanical agitation type flotation machine sorting -0.25+0.074mm particle size fraction material, mainly
It is made of components such as base, groove body, mixing component, spindle unit, motor, frequency converter, flowmeter and control switches.When work,
Motor drives main shaft rotation by motor pulley and spindle pulley, and impeller is rotated with main shaft, then in cover board and
Parital vacuum area is formed between impeller, air is sucked by suction pipe through air collector, while ore pulp (concentration is 100~200g/L) is through inhaling
Slurry pipe is inhaled into, and impeller guide vane of the centrifugal force through side edge thereof that rotation generates is borrowed to be got rid of into slot after the two mixing.Leaf
The strong stirring of wheel makes the air-dispersion in ore pulp into bubble and is uniformly distributed in ore pulp, when the ore particle of suspension is in bubble hit
When contact, the preferable ore particle of hydrophobicity, which is just attached on bubble and is brought by bubble, forms mineralized froth layer to liquid level, then by scraping
Plate scrapes the ore particle being not attached on bubble as concentrate and stays in slot as tailing.Equipment design parameter is as follows, material size
Range is 0~0.25mm, and processing capacity is 6~12kg/h；Wheel speed is suitable for that adjustable range is 0~2600r/min, and impeller is straight
Diameter is 55mm, and scraper plate revolving speed is suitable for that adjustable range is 5~30r/min；Aeration quantity is suitable for that adjustable range is 100~600mL/
(m2Min), it is 20~30 DEG C that slurry temperature, which is suitable for adjustable range, and ore pulp mass concentration is suitable for that adjustable range is 100~200g/
L.A flotation in the present embodiment, pan feeding tenor are 18.35%；When sorting, wheel speed 1800r/min, scraper plate
Revolving speed is 15r/min, and aeration quantity is 400mL/ (m2Min), slurry temperature is 25 DEG C, and ore pulp mass concentration is 150g/L；Make
Kerosene consumption for collecting agent is 60g/t, and the terpenic oil dosage as foaming agent is 30g/t；The metal that first time flotation obtains
The metal content for being enriched with body is 85%, metal recovery rate 87%；The pan feeding tenor of secondary flotation is 85%；When sorting,
Wheel speed is 1800r/min, and scraper plate revolving speed is 15r/min, and aeration quantity is 400mL/ (m2Min), slurry temperature is 25 DEG C,
Ore pulp mass concentration is 150g/L；Slurry pH is 3.9, and the double xanthate dosage as collecting agent is 80g/t, as foaming agent
Terpenic oil dosage is 30g/t；The grade for the copper that secondary flotation obtains is 87%, and the rate of recovery of copper is 84%.
It is noted that when using Falcon centrifugal classifier sorting -0.074mm particle size fraction material, mainly by rotating cylinder, turn
The components such as son, buffer board, glazing bar and feed pipe composition；When work, (concentration is 20~40g/L) by diversion pipe to material after sizing mixing
Into after the interior cylinder bottom of rotation, rotating cylinder inwall is thrown to by centrifugal force, meanwhile, the back-flushing with certain pressure is from inside and outside
Water jacket between rotating cylinder flows vertically through the inlet opening on inner wall, makes to sink into material loosening or fluidization between reflex circle.?
Under the collective effect of centrifugal force and back-flushing, the big material of the small density of granularity can overcome the Radial resistant force of back-flushing and be centrifuged it is heavy
Drop or brill gap permeate material bed gap and arrive at cone wall, even very fine high density material can also penetrate bed, and it is close
Lesser material is spent because suffered centrifugal force is smaller, in addition being difficult to overcome the effect of back-flushing, finally in the impulse force of axial water flow
Under the collective effect of the axial thrust load of centrifugal force, screwing out interior rotating cylinder becomes product from failing.Shutting down and interrupting feed water supply
Intermittently, interior rotating cylinder is unloaded, wherein heavy product will pour concentrate slot as concentrate product.Equipment design parameter is as follows, material size
Range is 0~0.5mm, and processing capacity is 6~18kg/h；The water pressure that enters to recoil is suitable for that adjustable range is 0.01~0.04MPa, rolling
Cylinder speed is suitable for that adjustable range is 30~50Hz, and feed thickness is suitable for that adjustable range is 20~40g/L.In the present embodiment
Pan feeding tenor is 4.5%；When sorting, recoil water pressure is 0.03MPa, and roller speed is 35Hz, and feed thickness is
30g/L；The metal content for sorting obtained metal concentrate is 86%, metal recovery rate 76%.
It is noted that the flotation tailing (containing metals such as gold, silver and zinc) that the present embodiment obtains secondary direct flotation carries out
Then filtering recycles magnetisable material iron, nickel in the flotation tailing etc. using wet magnetic separation；It is returned using acid leaching process and electrolysis method
Receive the silver in magnetic tailing；Using gold, platinum and the palladium in aqua regia dissolution's method and extraction recycling magnetic tailing.
It is noted that the present embodiment obtains sorting -1+0.5mm, -0.5+0.25mm and -0.074mm particle size fraction material
Metal concentrate be filtered, magnetisable material iron therein, nickel etc. are then recycled using wet magnetic separation；Using acid leaching process and
Electrolysis method recycles the copper and silver in magnetic tailing；Using gold, platinum and the palladium in aqua regia dissolution's method and extraction recycling magnetic tailing；
It is noted that the nonmetallic enrichment body being recovered to is used to prepare modified pitch, as composite wood by the present embodiment
The packing material of material, heat treatment prepare active carbon and porous silicate.
In conclusion the present invention provides a kind of wet split recovery process of valuable component in waste printed circuit board, this hair
Bright technique is according to the chemical composition of waste printed circuit board, physical characteristic and metal enrichment situation, using a variety of physical separation technologies
Separate the metal component and nonmetallic ingredient in different grain size grade material, obtained metal concentrate and nonmetallic rich group product
Quality it is higher, the rate of recovery is higher, and assorting room is economic and environment-friendly, avoids the broken and dust pollution in assorting room and has
The evolution of malicious pernicious gas.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.
Claims (9)
1. the wet split recovery process of valuable component in a kind of waste printed circuit board, which is characterized in that mainly comprise the steps that
Step 1 disassembles waste printed circuit board, the waste printed circuit board bare board after being disassembled；
Step 2 carries out removing solder to waste printed circuit board bare board；
Step 3 will remove the waste printed circuit board bare board after solder and successively carry out wet process coarse crushing and wet process is fine crushing, obtain discarded circuit
Plate particle；
Waste printed circuit board particle is fed Wet multi-stage vibrating screen progress sieve classification by step 4, and obtaining particle size fraction is -1+
The material of 0.5mm, -0.5+0.25mm, -0.25+0.074mm and -0.074mm；
Particle size fraction is fed diameter-verifying water medium point for the material of -1+0.5mm, -0.5+0.25mm and -0.074mm by step 5 respectively
Bed, waterpower shaking table and Falcon centrifugal classifier is selected to be sorted；The material that particle size fraction is -0.25+0.074mm is fed into flotation
Machine is sorted；It is sorted, respectively obtain metal concentrate and nonmetallic enrichment body；
Step 6 recycles metal concentrate that each equipment sorts and nonmetallic enrichment body respectively；
In the step 5, -1+0.5mm particle size fraction the material feeds the sorting of diameter-verifying water medium sorting bed, the diameter-verifying water medium
The material size range of sorting bed is 0.25~1mm, and processing capacity is 6~21kg/h；Water velocity adjustable range be 5.5~
7.5m3/ h, bed body tilt adjustment range are 25o~40o, and delivery rate adjustable range is 100~350g/min；
- 0.5+0.25mm particle size fraction the material feeds waterpower separation by shaking table, and the material size range of the waterpower shaking table is 0~
0.5mm, processing capacity are 50~100kg/h；Stroke adjustable range be 8~30mm, jig frequency adjustable range be 240~380 times/
Min, cross fall adjustable range are 2.5 °~4.5 °, and feed ore concentration adjustable range is 10%~30%；
- 0.074mm particle size fraction the material feeds Falcon centrifugal classifier, the material size of the Falcon centrifugal classifier
Range is 0~0.5mm, and processing capacity is 6~18kg/h；Entering back-flushing pressure regulation spectrum is 0.01~0.04MPa, roller rotation
Turning frequency-tuning range is 30~50Hz, and feed thickness adjustable range is 20~40g/L；
- 0.25+0.074mm particle size fraction the material feeds flotation device and is sorted, and carries out a reverse flotation first and obtains non-gold
Belong to enrichment body, secondary direct flotation then is carried out to the metal concentrate that sorting obtains, obtains copper concentrate and flotation tailing.
2. the wet split recovery process of valuable component, feature exist in a kind of waste printed circuit board according to claim 1
In the component for being disassembled waste printed circuit board in the step 1 passes sequentially through component classification, the inspection of component performance
It surveys and carries out classification processing；In the step 2, the scruff obtained to removing solder is successively slightly refined and is refined, and obtains solder.
3. the wet split recovery process of valuable component, feature in a kind of waste printed circuit board according to claim 1 or 2
It is, in the step 3, using wet type bi-fluted roller type crusher and wet type impact-hammer type disintegrator to discarded after removing solder
Circuit board bare board successively carries out wet process coarse crushing and wet process is fine crushing.
4. the wet split recovery process of valuable component, feature exist in a kind of waste printed circuit board according to claim 3
In the waste printed circuit board grain diameter obtained after the wet process coarse crushing is less than 20mm, the discarded electricity obtained after the wet process is fine crushing
Road plate grain diameter is less than 1mm.
5. the wet split recovery process of valuable component, feature exist in a kind of waste printed circuit board according to claim 4
In in the step 3, the volume for the water being added during wet process coarse crushing accounts for wet type bi-fluted roller type crushing chamber of crusher volume
10%~20%, wet process it is fine crushing during be added water volume account for wet type beater type crushing chamber of crusher volume 20%~
30%.
6. the wet split recovery process of valuable component, feature exist in a kind of waste printed circuit board according to claim 5
In, in the step 4, the screen size of the Wet multi-stage vibrating screen be successively from top to bottom 1mm, 0.5mm, 0.25mm and
0.074mm；The shake frequency adjustable range of vibrating motor is 900~1500 times/min in the Wet multi-stage vibrating screen, and amplitude is adjusted
Range is 4~8mm, and vibrating direction angle adjustable range is 40 °~60 °.
7. the wet split recovery process of valuable component, feature exist in a kind of waste printed circuit board according to claim 1
In the material size range of the flotation device is 0~0.5mm, and flotation cell volume is 1.5L, and processing capacity is 6~12kg/h；Leaf
Wheel speed adjustable range is 0~2600r/min, and scraper plate rotational speed regulation range is 5~30r/min；Aeration quantity adjustable range is 100
~600mL/ (m2Min), slurry temperature adjustable range is 20~30 DEG C, and ore pulp mass concentration adjustable range is 100~200g/
L。
8. the wet split recovery process of valuable component, feature exist in a kind of waste printed circuit board according to claim 7
In being filtered to the flotation tailing after secondary direct flotation, then recycle the magnetic material in the flotation tailing using wet magnetic separation
Matter；Using the silver in acid leaching process and electrolysis method recycling magnetic tailing；Magnetic tailing is recycled using aqua regia dissolution's method and extraction
In gold, platinum and palladium.
9. the wet split recovery process of valuable component, the step 6 in a kind of waste printed circuit board according to claim 8
The middle obtained nonmetallic enrichment body that sorts can be used for preparing modified pitch, the packing material as composite material and heat treatment preparation
Active carbon and porous silicate.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710486372.3A CN107442264B (en) | 2017-06-23 | 2017-06-23 | The wet split recovery process of valuable component in a kind of waste printed circuit board |
| PCT/CN2018/085436 WO2018233383A1 (en) | 2017-06-23 | 2018-05-03 | Wet separation and recovery process for recovering valuable constituents from waste circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710486372.3A CN107442264B (en) | 2017-06-23 | 2017-06-23 | The wet split recovery process of valuable component in a kind of waste printed circuit board |
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| Publication Number | Publication Date |
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| CN107442264A CN107442264A (en) | 2017-12-08 |
| CN107442264B true CN107442264B (en) | 2019-04-05 |
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| WO (1) | WO2018233383A1 (en) |
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|---|---|---|---|---|
| CN107442264B (en) * | 2017-06-23 | 2019-04-05 | 中国矿业大学 | The wet split recovery process of valuable component in a kind of waste printed circuit board |
| CN108736087A (en) * | 2018-05-23 | 2018-11-02 | 深圳市恒创睿能环保科技有限公司 | A kind of technique that hydrometallurgic recovery discards valuable constituent in power battery |
| CN108940567B (en) * | 2018-07-02 | 2020-04-07 | 兰州理工大学 | Hydrothermal vulcanization-warm water flotation separation method for copper in waste circuit board |
| CN109500051A (en) * | 2018-10-18 | 2019-03-22 | 东莞理工学院 | A kind of waste printed circuit board recycling and reusing method |
| CN109482335B (en) * | 2018-11-28 | 2021-02-09 | 中南大学 | Method for separating copper and tin in waste circuit board through flotation |
| CN109569881A (en) * | 2018-12-06 | 2019-04-05 | 清远市进田企业有限公司 | A method of copper alloy is prepared using waste and old circuit board recycling |
| CN110551897B (en) * | 2019-08-26 | 2021-07-20 | 华南理工大学 | Process for preparing pure copper powder by treating waste circuit board through mechanical and physical method |
| CN112458284A (en) * | 2019-09-06 | 2021-03-09 | 永仁共创锌业有限公司 | Method for recovering carbon, copper, iron and silver from zinc oxide slag |
| CN113522513B (en) * | 2021-07-16 | 2023-03-14 | 山东科技大学 | Wet sorting process for waste circuit boards |
| CN113528837B (en) * | 2021-07-26 | 2022-03-25 | 中南大学 | Method for removing impurity metals by pretreating and sorting waste circuit board copper powder |
| CN113477379B (en) * | 2021-07-29 | 2022-09-30 | 九江一晖环保集团有限公司 | Waste metal recovery method based on material balance |
| CN114107669A (en) * | 2021-11-12 | 2022-03-01 | 江苏荣麒循环科技有限公司 | Metal refining and recycling method based on waste electronic chip crushing material |
| BE1030118B1 (en) | 2021-12-28 | 2023-07-26 | Craenhals Metal Terminal Nv | PROCEDURE FOR SEPARATING METAL-RICH WASTE |
| CN114427030A (en) * | 2022-01-20 | 2022-05-03 | 安徽燊岚环境科技有限公司 | Method for recycling precious metals from waste circuit boards |
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| WO2018233383A1 (en) | 2018-12-27 |
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